Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Share data	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Revenues:
Rental and other property	$ 115,778	$ 99,163	$ 227,866	$ 198,436
Management and other fees from affiliates	1,420	1,022	2,645	2,500
Total revenues	117,198	100,185	230,511	200,936
Expenses:
Property operating, excluding real estate taxes	29,354	25,101	57,569	49,624
Real estate taxes	10,916	9,716	21,595	19,210
Depreciation	37,510	31,156	74,426	61,539
General and administrative	6,371	6,219	12,486	11,837
Total Expenses	84,151	72,192	166,076	142,210
Earnings from operations	33,047	27,993	64,435	58,726
Interest expense before amortization	(22,710)	(20,161)	(44,518)	(39,758)
Amortization expense	(2,736)	(843)	(5,590)	(2,083)
Interest and other income	2,628	7,085	9,616	14,941
Equity income (loss) in co-investments	726	(360)	(647)	(401)
Loss on early retirement of debt	(253)	(10)	(253)	(10)
Income before discontinued operations	10,702	13,704	23,043	31,415
Income from discontinued operations	5,351	165	5,517	313
Net income	16,053	13,869	28,560	31,728
Net income attributable to noncontrolling interest	(2,304)	(3,844)	(5,851)	(8,034)
Net income attributable to controlling interest	13,749	10,025	22,709	23,694
Dividends to preferred stockholders	(1,475)	(543)	(2,017)	(1,085)
Excess of cash paid to redeem preferred stock and units over the carrying value	(1,949)	0	(1,949)	0
Net income available to common stockholders	$ 10,325	$ 9,482	$ 18,743	$ 22,609
Basic:
Income available to common stockholders	$ 0.17	$ 0.32	$ 0.43	$ 0.77
Income from discontinued operations	$ 0.15	$ 0	$ 0.16	$ 0.01
Net income available to common stockholders	$ 0.32	$ 0.32	$ 0.59	$ 0.78
Weighted average number of common shares outstanding during the period	32,040,904	29,329,273	31,754,949	29,149,562
Diluted:
Income before discontinued operations available to common stockholders	$ 0.17	$ 0.32	$ 0.43	$ 0.76
Income from discontinued operations	$ 0.15	$ 0	$ 0.16	$ 0.01
Net income available to common stockholders	$ 0.32	$ 0.32	$ 0.59	$ 0.77
Weighted average number of common shares outstanding during the period	32,135,064	29,402,635	31,844,002	29,213,613
Dividend per common share	$ 1.040	$ 1.033	$ 2.080	$ 2.066